摘要
利用水溶性高聚物的水溶液在无机盐存在下可分成两相的特点,将茶多酚转至高聚物相,加入三羟甲基氨基甲烷,调节溶液pH8,以酒石酸亚铁为显色剂,用分光光度法测定茶饮料中的茶多酚含量。结果显示,茶多酚在0.004-0.4mmol·L^-1浓度范围内具有良好的线性关系。其相关系数R^2=0.9999,加标回收率为92.4%~103.5%,该方法检测快速、准确、无毒,而且易于操作。
Make use of the trait of aqueous polymer could separated two phases with solution in the presence of inorganic salt,tae-polyphenol was transferred polymer phase. In an Tris buffer medium of pH8,the content of tae-polyphenol was determined with Spectrophotometer. Good linear relationships was obtained in the range of 0.004N0.4mmol·L^-1 of tae-polyphenol per milliliter of solution(R^2=0.9999),and recoveries were found in the range of 92.4%-103.5%. The method was quick,accurate and handled easily.
出处
《食品工业科技》
CAS
CSCD
北大核心
2013年第8期79-82,共4页
Science and Technology of Food Industry
关键词
茶多酚
聚乙二醇-4000
萃取
分光光度法
tea polyphenols
polyethylene glycol-4000
extraction
spectrophotometry